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From 1980 to 1990, the consumer price index (CPI) increased from 82.4 to 130.7. If a bottle of dish soap cost $0.74 in 1980 and the price of dish soap increased at the same rate as the CPI from 1980 to 1990, by approximately how much did the price of a bottle of dish soap increase from 1980 to 1990?

Respuesta :

Using proportions, it is found that the price of a bottle of dish soap increased $0.43 from 1980 to 1990.

What is a proportion?

A proportion is a fraction of a total amount, and the measures are related using a rule of three.

The percent increase, as a proportion, of the CPI is given by:

P = 130.7/82.4 = 1.5862.

Hence, for the price of the bottle:

Pb = $0.74 x 1.5862 = $1.17.

The difference is:

1.17 - 0.74 = $0.43.

More can be learned about proportions at https://brainly.com/question/24372153

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